Data processing method, related device, and system for optical transport network

Abstract

Embodiments of the present invention provide a data processing method, related device, and system for an optical transport network. The data processing method for the optical transport network includes: encapsulating service data into an optical payload unit; mapping the optical payload unit to an optical channel data unit; mapping the optical channel data unit to a payload area of an optical burst transport unit; performing electrical-optical conversion on the optical burst transport unit to form an optical burst transport unit; carrying the optical burst transport unit onto an optical timeslot of an optical burst channel; and transmitting the optical burst channel to a line. Technical solutions provided by the present invention can effectively simplify a data processing process and reduce a data processing delay.

What is claimed is: 
     
       1. A service data processing method for an optical transport network, comprising:
 encapsulating service data into an optical payload unit; 
 mapping the optical payload unit to an optical channel data unit; 
 mapping the optical channel data unit to a payload area of an optical burst transport unit; 
 performing electrical-optical conversion on the optical burst transport unit to form an optical burst; 
 carrying the optical burst onto an optical timeslot of an optical burst channel, a number of electrical timeslots occupied by the optical burst transport unit being equal to the number of optical timeslots occupied by the optical burst channel; and 
 transmitting the optical burst channel to a line, including performing optical burst timeslot multiplexing or optical burst add/drop multiplexing on the optical burst channel and optical burst channels mapped from other optical channel data units, to form an optical burst multiplex section, wherein the optical burst timeslot multiplexing or the optical burst add/drop multiplexing is performed at the optical layer, the electrical timeslots and the optical timeslots respectively corresponding to an electrical layer and an optical layer, and each electrical timeslot having a same time length as each optical timeslot. 
 
     
     
       2. The method according to  claim 1 , wherein the mapping the optical channel data unit to the payload area of the optical burst transport unit is specifically:
 mapping the optical channel data unit, whose signal time length is less than or equal to a frame period of the optical burst transport unit, to the payload area of the optical burst transport unit. 
 
     
     
       3. The data processing method according to  claim 1 , wherein the optical burst transport unit further carries a preamble and a guard time. 
     
     
       4. The data processing method according to  claim 1 , wherein the transmitting the optical burst channel to the line comprises:
 performing cross-connection on the optical burst channel and optical burst channels mapped from other optical channel data units, wherein the cross-connection is performed at the optical layer. 
 
     
     
       5. The data processing method according to  claim 1 , wherein a bit rate corresponding to the optical channel data unit is not greater than the bit rate of the optical burst transport unit. 
     
     
       6. The data processing method according to  claim 1 , wherein before the carrying the optical burst onto the optical timeslot of the optical burst channel, the data processing method comprises:
 for optical burst channels at different bit rates, dividing each frame into different numbers of optical timeslots, so that all optical timeslots have a same bandwidth granularity. 
 
     
     
       7. The data processing method according to  claim 1 , wherein before the carrying the optical burst onto the optical timeslot of the optical burst channel, the data processing method comprises:
 for optical burst channels at different bit rates, dividing each frame into the same number of optical timeslots.